i8 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. -J-} 



Comparative Measurements 



Type of L. 

 schucherii 



Type of L. 

 coloradoensis 



Length of stride ; . . . . 



Width of trackway 



Manus 



Width of impressions 



Length of digit III 



Pes 



Width 



Length to tip of digit III without claw 



Length of digit I 



Length of digit II 



Length of digit III 



Length of digit IV 



Length of digit V 



From tip to tip of outer digits 



Specimen 

 No. 11,176 

 U. S. N. M. 



tnm. 



109.0 ' 



85.0 



19.0 



> = avcrage. 



Genus BAROPEZIA Matthew 



This genus was founded by Matthew ^ on specimens from the 

 Coal Measures of Nova Scotia and included two species, Baropezia 

 sydnensis (Dawson) and B. abcissa Matthew. Footprints from the 

 Grand Canyon have a considerable resemblance to those of B. syd- 

 nensis in size, triangular form of the imprints of the pes, and smaller 

 manus with short, heavy toes radially arranged, and I therefore ten- 

 tatively refer the following new species to this genus. 



BAROPEZIA EAKINI, new species 



Plates 8 and 9 



Type. — ^Catalogue number 11,137, U. S. N. M. Consists of a 

 short consecutive series of deeply impressed tracks of which the 

 obverse side is also preserved. 



Paratype. — Catalogue number 11,138, U. S. N. M. Consists of 

 a large slab of consecutive tracks that are less deeply impressed than 

 the type. 



Type locality. — Hermit Trail, Hermit Basin, Grand Canyon Na- 

 tional Park, Arizona. 



^ Matthew, G. F., Proc. and Trans. Roy. Soc. Canada, 2d Ser., Vol. 10, 1904, 

 p. 100. 



